## What outputs (metrics) does PlateMate produce?

Here you will find an overview of all metrics plus short descriptions of what each metric means and it’s corresponding unit.

**Flight Time**

Explanation: Time spent in the flight phase.

Unit: s

**Net Impulse**

Explanation: The total impulse (bodyweight subtracted) applied during the braking+propulsive phase.

Unit: N.s

**Jump Height (Flight Time)**

Explanation: Jump Height calculated by Flight Time (FT).

Unit: cm

**Jump Height (Net Impulse)**

Explanation: Jump Height calculated by Net Impulse (NI).

Unit: cm**Peak Braking Force**Explanation: The peak instantaneous force during the braking phase.

Unit: N

**Avg Braking Force**Explanation: The average force during the braking phase.

Unit: N

**Min Braking Velocity**

Explanation: The minimum velocity during the braking phase.

Unit: m/s

**Avg Braking Velocity**

Explanation: The average velocity during the braking phase.

Unit: m/s

**Peak Braking Power**

Explanation: The peak instantaneous power during the braking phase.

Unit: W

**Avg Braking Power**

Explanation: The average mechanical power during the braking phase.

Unit: W

**Braking Work**

Explanation: The total work done during the braking phase.

Unit: J

**Force @ Zero Velocity**

Explanation: The force applied at the moment when velocity is zero.

Unit: N

**Avg Propulsive Force**

Explanation: The average force during the propulsive phase.

Unit: N

**Peak Propulsive Force**

Explanation: The peak instantaneous force during the propulsive phase.

Unit: N

**Peak Propulsive Velocity**

Explanation: The highest velocity reached during the propulsive phase.

Unit: m/s

**Avg Propulsive Velocity**

Explanation: The average velocity during the propulsive phase.

Unit: m/s

**Peak Propulsive Power**

Explanation: The maximum power output during the propulsive phase.

Unit: W

**Avg Propulsive Power**

Explanation: The average power output during the propulsive phase.

Unit: W

**Propulsive Work**

Explanation: The total work done during the propulsive phase.

Unit: J

**Avg Braking RFD**

Explanation: The average slope of force during the braking phase.

Unit: N/s

**Left Braking RFD**

Explanation: The average (left) slope of force during the braking phase.

Unit: N/s

**Right Braking RFD**

Explanation: The average (right) slope of force during the braking phase.

Unit: N/s

**Braking RFD Symmetry Index**Explanation: Symmetry Index (SI) % of the average braking RFD – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**Deceleration RFD**

Explanation: The rate of force development during deceleration.

Unit: N/s

**Deceleration RFD, Left**

Explanation: The rate of force development during deceleration for the left side.

Unit: N/s

**Deceleration RFD, Right**

Explanation: The rate of force development during deceleration for the right side.

Unit: N/s

**Deceleration RFD, Symmetry Index**

Explanation: Deceleration RFD Symmetry Index (SI) with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**System Weight**

Explanation: Measured weight of the user during the weighting phase, just before the jump.

Unit: kg

**Takeoff Velocity**

Explanation: The velocity at takeoff.

Unit: m/s

**Peak Force**

Explanation: The peak instantaneous force during the entire jump.

Unit: N

**Peak Velocity**

Explanation: The peak instantaneous velocity during the propulsion phase.

Unit: m/s

**Peak Power**

Explanation: The peak instantaneous power during the entire jump.

Unit: W

**Force @ Peak Power**

Explanation: The instantaneous force at peak power (of entire dataset).

Unit: N

**Velocity @ Peak Power**

Explanation: The instantaneous velocity at peak power (of entire dataset).

Unit: m/s

**Time to Peak Force**

Explanation: time from initiation of the jump to max peak force encountered during the jump.

Unit: s

**Avg RFD**

Explanation: Average Rate-of-Force Development (RFD).

Unit: N/s

**Contact Time**

Explanation: Time spent in contact with the PlateMate during the jump analysis, before takeoff.

Unit: s

**RSI**

Explanation: RSI = Flight Time / Contact Time.

Unit: No unit (ratio)**RSI Modified**

Explanation: Modified RSI (mRSI) = Jump Height (FT) / Contact Time.

Unit: m/s

**RSI Exponential**

Explanation: Our own formula for RSI during Drop Jumps: FlightTime^2 / Contact Time.

Unit: m/s

**Left net impulse**

Explanation: The Left impulse (bodyweight subtracted) applied during the braking+propulsive phase

Unit: N s

**Right net impluse**

Explanation: The Right impulse (bodyweight subtracted) applied during the braking+propulsive phase

Unit: N s

**Net Impulse Symmetry Index**

Explanation: Net impulse Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**Left Peak Force**

Explanation: Left Peak Force encountered during the jump

Unit: N

**Right Peak Force**

Explanation: Right Peak Force encountered during the jump

Unit: N

**Peak Force Symmetry Index**

Explanation: Peak Force Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**Left – time to peak force**

Explanation: (Left) Time taken to reach peak instantaneous force (from start of jump)

Unit: s

**Right – time to peak force**

Explanation: (Right) Time taken to reach peak instantaneous force (from start of jump)

Unit: s

**Time to peak force Symmetry Index**

Explanation: Average braking RFD Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**Left Avg braking RFD**

Explanation: The (Left) average RFD during the braking phase

Unit: N/s

**Right Avg braking RFD**

Explanation: The (Right) average RFD during the braking phase

Unit: N/s

**Avg braking RFD Symmetry Index**

Explanation: Average braking RFD Symmetry Index (SI) % – with the calculation being diff / sum * 100. Positive values favor the left, negative values favor the right.

Unit: %

**Unweighting Duration**

Explanation: Duration of the unweighting fase

Unit: s

**Braking Duration**

Explanation: Duration of the braking fase

Unit: s

**Propulsive Duration**

Explanation: Duration of the propulsive fase

Unit: s

## Force plate outputs per jump type

PlateMate can detect different types of jumps. Depending on which type, different metrics will be calculated.

The following is a list of metrics calculated for each jump type

### Countermovement jump (CMJ)

- Left net impulse
- Right net impluse
- Net Impulse Symmetry Index
- Left Peak Force
- Right Peak Force
- Peak Force Symmetry Index
- Left – time to peak force
- Right – time to peak force
- Time to peak force Symmetry Index
- Left Avg RFD
- Right Avg RFD
- Avg braking RFD Symmetry Index
- Unweighting Duration
- Braking Duration
- Propulsive Duration
- Peak Braking Force
- Avg Braking Force
- Min Braking Velocity
- Avg Braking Velocity
- Peak Braking Power
- Avg Braking Power
- Braking Work
- Force @ Zero Velocity
- Avg Propulsive Force
- Peak Propulsive Force
- Peak Propulsive Velocity
- Avg Propulsive Velocity
- Peak Propulsive Power
- Avg Propulsive Power
- Propulsive Work
- Avg Braking RFD
- Left Braking RFD
- Right Braking RFD
- Braking RFD Symmetry Index
- Deceleration RFD
- Deceleration RFD, Left
- Deceleration RFD, Right
- Deceleration RFD, Symmetry Index
- System Weight
- Flight Time
- Net Impulse
- Jump Height (Flight Time)
- Jump Height (Net Impulse)
- Takeoff Velocity
- Peak Force
- Peak Velocity
- Peak Power
- Force @ Peak Power
- Velocity @ Peak Power
- Time to Peak Force
- Avg RFD
- Contact Time
- RSI Modified

### Squat jump (SJ)

- Left net impulse
- Right net impulse
- Net Impulse Symmetry Index
- Left Peak Force
- Right Peak Force
- Peak Force Symmetry Index
- Left – time to peak force
- Right – time to peak force
- Time to peak force Symmetry Index
- Avg Propulsive Force
- Peak Propulsive Force
- Peak Propulsive Velocity
- Avg Propulsive Velocity
- Peak Propulsive Power
- Avg Propulsive Power
- Propulsive Work
- Deceleration RFD, Left
- Deceleration RFD, Right
- Deceleration RFD, Symmetry Index
- System Weight
- Flight Time
- Net Impulse
- Jump Height (Flight Time)
- Jump Height (Net Impulse)
- Takeoff Velocity
- Peak Force
- Peak Velocity
- Peak Power
- Force @ Peak Power
- Velocity @ Peak Power
- Time to Peak Force
- Avg RFD
- Contact Time
- RSI
- RSI Modified

### Drop jump (DJ)

- System Weight
- Flight Time
- Jump Height (ft)
- Contact Time
- RSI
- RSI Modified
- RSI Exponential